文献类型：期刊文献

英文题名：The influence of uneven frost heave and thermal conditions on the deformation and damage of slab track in seasonally frozen regions

作者：Zhang, Kaiyao Ren, Juanjuan Ye, Wenlong Li, Chen Xu, Guihong Liu, Wengao Deng, Shijie

第一作者：Zhang, Kaiyao

通信作者：Ren, JJ[1];Ren, JJ[2]

机构：[1]Southwest Jiaotong Univ, State Key Lab Rail Transit Vehicle Syst, Chengdu 610031, Peoples R China;[2]Southwest Jiaotong Univ, Sch Civil Engn, Chengdu 610031, Peoples R China;[3]Guizhou Inst Technol, Sch Civil Engn, Guiyang 5500031, Peoples R China

第一机构：Southwest Jiaotong Univ, State Key Lab Rail Transit Vehicle Syst, Chengdu 610031, Peoples R China

通信机构：corresponding author), Southwest Jiaotong Univ, State Key Lab Rail Transit Vehicle Syst, Chengdu 610031, Peoples R China;corresponding author), Southwest Jiaotong Univ, Sch Civil Engn, Chengdu 610031, Peoples R China.

年份：2024

卷号：157

外文期刊名：ENGINEERING FAILURE ANALYSIS

收录：;Scopus(收录号：2-s2.0-85180550084);WOS:【SCI-EXPANDED(收录号:WOS:001143127600001)】；

基金：This research is sponsored by the National Key R & D Program of China, China (2021YFF0502100) , the National Natural Science Foundation of China, China (52278461, 52278459, 52308467) , the Postdoctoral Innovation Talents Support Program, China (BX20230298) , and the Sichuan Province Youth Science and Technology Innovation team, China (2022JDTD0015) .

语种：英文

外文关键词：Seasonally frozen regions; Slab track; Uneven frost heave; Thermal load; Failure pattern

摘要：To ensure the secure operation of high-speed trains in seasonally frozen regions, this paper investigates the deformation and failure patterns of slab tracks subjected to uneven frost heave and environmental issues. Utilizing our team's previous research findings, finite element analysis software was employed to construct a mechanical transfer calculation model for the subgrade and slab track. This model was used to explore the relationship between uneven frost heave and slab track deformation at different time periods, along with the track structure's damage behavior. In addition, comprehensive temperature field tests were conducted on the China railway track system (CRTS) III slab track, probing temperature variations, warping deformations, and stress distributions within the track structure. Finally, the interaction of uneven frost heave and thermal loads unveiled the interlayer debonding and stress characteristics of slab track structures across different months in seasonally frozen regions. The results revealed that the greater amplitude of frost heave and the smaller wavelength led to a higher change rate of rail irregularity. The uneven lateral deformation of the subgrade surface due to the sunny-shady slopes effect resulted in significant rail level irregularity of slab tracks. The combined impact of short-wavelength frost heave and temperature gradient loads emerged as the primary cause of macroscopic damage and stiffness degradation of concrete materials within slab track structures. These findings will help to understand the mechanical behavior of slab tracks in cold regions, thereby improving the quality of high-speed railway operations.